Malicious PDF — malware analysis report

Static analysis result for SHA-256 5897633889ccca25…

MALICIOUS

PDF

62.3 KB Created: 2021-09-24 02:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ff3c40e867f0e4ad92051bd0d693ed99 SHA-1: 59a1c548a4864aa8fa1341caa2ad85a488c9e6e6 SHA-256: 5897633889ccca2559162ed38b4f67a70ae681dc17c5be155b04dd4ea63b6d70
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7000

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/2688253403.pdf In PDF document text
    • http://humansharehouse.com/userData/board/file/47910224245.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/96979758509.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/17456827069.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/69785960252.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/g08r2ftjukfphgvu2lhfs59rs1/83022059898.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/bivekidewa.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210911212506934.pdfIn PDF document text
    • http://bollnas.boj.se/uploads/userfiles/files/fatabewefupetaxupemilifi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5fee6b79b---70813356157.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/27915151868.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/gifisejonapunijemeja.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/33296751961.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16143e9c1a7630---kodidoxejaredubivesubiz.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/jojezopoj.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/ripagajinenaludan.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/rovevibexugetawujiluxako.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/68878983693.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/25682377258.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/8279357530.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/72452382333.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/bc31275887288909da610e1188edc855/sutilol.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/finurazozibi.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/59418363617.pdfIn PDF document text
    • http://retailcop.ca/files/41256793414.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=conflict+of+nations+ww3+mod+apkPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/wigodabipa.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD820 10932 bytes
SHA-256: c3f4a5a0bc12fa8e1f59f8030260ef08287edb36ddced98b5dd5e4e6fd832b0a

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